[Ingestor] Creates duplicate variants

It looks like one of our tool doesnt recognise existing variants or creates double variants. This could be a duplicated ticket #177 (closed)

If you have a look at shot FL001_0601 in virgin you will see twice "Undistorted" variant.

This happened after I did this:

• Create image sequence using nuke:
  • EXRs: \\studio\jobs\INK515_Virgin\SHOTS\FL001\FL001_0601\RENDERS\TRACKING\Main\nuke\Undistorted\v001
  • PNGs: \\studio\jobs\INK515_Virgin\SHOTS\FL001\FL001_0601\RENDERS\TRACKING\Main\nuke\ReviewUndistorted

Note that Undistorted is not a variant its a pass here.

• Make a quicktime from that image sequence (png) using media builder
• Ingest the above EXR image sequence as Plate LIGHTING Undistorted
• Ingest the above PNG image sequence as Plate ANIMATION Undistorted (I beleive selecting the Variant created, but maybe typing it instead)

This resulted in having two Undistorted variants